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Unit of Measure

Series

 N/A S( )FJ

Material

 N/A 1117 Steel

Material Specification

 N/A ASTM A108

Heat Treat

 N/A None

Finish

 N/A Cadmium plate per QQ-P-416, Type II, Class 3

Military Part Number

 N/A MS51551D204B49

Lockring Part Number

 N/A RLRR21SA6

Lockring Military Part Number

 N/A MS51990-104P

Nut End Type

 N/A Undrilled

A Nut End Thread Size

 N/A 0.1900-32 UNJF-3A

B Stud End Thread Size

 N/A 0.2500-28

B Stud End Thread-Pitch Diameter

 N/A 0.2281-0.2296 in

B Stud End Thread-Minor Diameter

 N/A 0.2014-0.2090 in

C ±.015

 N/A 0.620 in

D ±.015

 N/A 0.560 in

E ±.015

 N/A 0.690 in

L ±.015

 N/A 3.062 in

Notes

 N/A
  • The stud end thread has a special pitch diameter and minor diameter which installs into a MIL-S-8879 class 3B, FED-STD-H28/2 class 3B, or National class 3 tapped hole.
  • Studs are installed in accordance with MS51995.
  • Mating lockring is not included with stud. It must be ordered separately.
  • <7>2 max incomplete threads.